Tharindu Dissanayake Email & Phone Number

Australia

Kalgoorlie, Western Australia, Australia

Maintaining geotechnical standards per the ground control management plan (GCMP) for RHP and Raleigh underground mine sites of Mungari operations, Kalgoorlie.• Conducting underground geotechnical QA/QC inspections to uphold the highest safety and reliability standards. • Geotechnical core logging.• Maintaining seismic system with mXrap and IMS software, ensuring proactive risk mitigation.• Data processing, analysis, and reporting on site seismic risks. Conducting post-seismic… Show more Maintaining geotechnical standards per the ground control management plan (GCMP) for RHP and Raleigh underground mine sites of Mungari operations, Kalgoorlie.• Conducting underground geotechnical QA/QC inspections to uphold the highest safety and reliability standards. • Geotechnical core logging.• Maintaining seismic system with mXrap and IMS software, ensuring proactive risk mitigation.• Data processing, analysis, and reporting on site seismic risks. Conducting post-seismic site inspections to assess and accurately address damage to ground supports.• Prepare detailed daily, weekly, and monthly seismic reports to inform decision-making and optimise operational strategies.• Deformation scanning and processing techniques to monitor ground stability and inform proactive measures.• Conduct Structural rock mapping for strategic ground support selection and minimise geological hazards.• Conducting site inspections and issuing rehabilitation plans to rectify damaged ground supports. Show less

Australia

• prepared rock, soil, and grout samples for rigorous laboratory testing, ensuring accuracy and reliability of results.• Conducted UCS, vane shear testing, and sieve analysis to assess material properties and inform engineering decisions.• Performed mix designs for backfill grout, shotcrete, and cable bolts, optimising formulations for superior performance and structural integrity.

Perth, Western Australia, Australia

Completed three-month drill and blast time in Duketon South Operations. Involved in surface blasting activities in Garden well, Rosemont, Tooheys, Idaho, Moolart well, and Benhur mine sites.• Ensured the quality of drill holes using Maptek Blastlogic tablet software for updating QA maps.• Primed with Pentex boosters, equipped with electric detonators.• Primed with packaged explosives, equipped with Nonel downhole detonators.• Loaded emulsion through hoses and ANFO through… Show more Completed three-month drill and blast time in Duketon South Operations. Involved in surface blasting activities in Garden well, Rosemont, Tooheys, Idaho, Moolart well, and Benhur mine sites.• Ensured the quality of drill holes using Maptek Blastlogic tablet software for updating QA maps.• Primed with Pentex boosters, equipped with electric detonators.• Primed with packaged explosives, equipped with Nonel downhole detonators.• Loaded emulsion through hoses and ANFO through buckets.• Tied-in shots using harness wire, Excel Connectadet Detonators and Cordtex detonating cord.• Operated a remote initiating Unitronic600 box.• Conducted stock take of explosives.• Designed blasts, drill patterns, production maps, initiation maps and blast exclusion maps using Maptek Vulcan software.• Designed shot tie-in plans using Orica Shotplus software.• Prepared blast reports and end-of-month reporting. Show less

Anuradhapura, North-Central, Sri Lanka

Construction of Upper Elahera Canal, Including 27.7km Long Tunnels (UECP ICB-2A)The contract package UECP-ICB-2A of the Upper Elahara canal project consists of two cut and cover sections at each end of the tunnel, totalling 391m, a 1.097km long Drill-and-blast tunnel (Tunnel 04), a 26.577km long TBM tunnel (Tunnel 03), and a 26m deep Start shaft situated between tunnel 03 and tunnel 04. • Strategically planned and supervised geotechnical investigations along tunnel… Show more Construction of Upper Elahera Canal, Including 27.7km Long Tunnels (UECP ICB-2A)The contract package UECP-ICB-2A of the Upper Elahara canal project consists of two cut and cover sections at each end of the tunnel, totalling 391m, a 1.097km long Drill-and-blast tunnel (Tunnel 04), a 26.577km long TBM tunnel (Tunnel 03), and a 26m deep Start shaft situated between tunnel 03 and tunnel 04. • Strategically planned and supervised geotechnical investigations along tunnel trace.• Conducted Geological mapping, classified rock mass, and formulated optimal ground support strategies for shafts and tunnels.• Supervised drill and blast excavation in the TBM access shaft and TBM access tunnel, ensuring adherence to safety protocols and project specifications.• Analysed and interpreted convergence and settlement monitoring data, offering strategic insights to optimise tunnel construction processes.• Managed an extensive groundwater monitoring program of 200+ monitoring points to assess hydrogeological conditions and mitigate risks effectively.• Compiled and presented monthly groundwater monitoring reports, including key findings and recommendations to management and project stakeholders.• Developed method statements and author technical reports, providing clear and concise documentation of project methodologies, findings, and recommendations. Show less

Engineering Geology And Site Investigations Unit

• Planned and supervised geotechnical investigation programs, optimising resources and schedules.• Conducted borehole and trial pit logging per BS 5930:1999, ensuring adherence to standards.• Developed geological models for easy visualisation of downhole data.• Supervised geotechnical field and lab tests (Standard Penetration Test, Dynamic Cone Penetration Test, Mackintosh Probe Test, Field Hydraulic Conductivity Test, Lugeon Test), ensuring quality and efficiency.• Supervised… Show more • Planned and supervised geotechnical investigation programs, optimising resources and schedules.• Conducted borehole and trial pit logging per BS 5930:1999, ensuring adherence to standards.• Developed geological models for easy visualisation of downhole data.• Supervised geotechnical field and lab tests (Standard Penetration Test, Dynamic Cone Penetration Test, Mackintosh Probe Test, Field Hydraulic Conductivity Test, Lugeon Test), ensuring quality and efficiency.• Supervised probe hole drilling and interpretation of data in tunnels.• Monitoring and supervision of consolidation and curtain grouting work on dam foundations.• Prepared geotechnical reports and foundation designs.• Conducted landslide risk and slope stability assessments, implementing mitigation measures.• Prepared recommendations on building settlement, slope and fill stability, and the possible effects of landslides and subsidence• Conducted ground vibration monitoring along the tunnel trace and mitigating social and environmental impacts during tunnel excavation.Major geotechnical investigation projects involved:o Geotechnical investigations for Wee Oya Multipurpose Reservoir Project (2020)o Geotechnical Investigations of Kaluganga Head Works (2014-2015)o Geotechnical investigations of the NWP Canal project (2014)o Geotechnical investigations along the extension of the southern highway from Godagama to Andarawewa (2013-2014)o Geotechnical Investigations of Broadlands Hydropower Project (2013)o Additional Geological Investigations for the Review of Feasibility Study of Moragolla Hydropower Project (2013)o Geotechnical Investigations for the Colombo Harbor South Container Terminal (2012-2013)o Geotechnical investigations of the proposed Matara- Kataragama railroad extension project from Ch. 63 + 250 km to 74+ 750 km (2011)o Geotechnical investigations for the Kaluganga development project (Phase I and Phase II) (2010-2011) Show less

Construction Of New Mulwal Tunnel

Project Details: Project: Torrington and New Mutwal Tunnel under the Colombo Storm Water Diversion Project. The employer: Ministry of Urban Development, Water Supply, and Housing FacilitiesConsultant: Yooshine Engineering Corporation, KoreaThe contractor for this project was the China Petroleum Engineering Corporation of ChinaFunding: the World BankThe New Mutwal Tunnel project comprised a 100m long inlet canal, a 777.62m long fully-lined tunnel, and an outlet… Show more Project Details: Project: Torrington and New Mutwal Tunnel under the Colombo Storm Water Diversion Project. The employer: Ministry of Urban Development, Water Supply, and Housing FacilitiesConsultant: Yooshine Engineering Corporation, KoreaThe contractor for this project was the China Petroleum Engineering Corporation of ChinaFunding: the World BankThe New Mutwal Tunnel project comprised a 100m long inlet canal, a 777.62m long fully-lined tunnel, and an outlet canal. The tunnel was excavated by an Earth Pressure Balancing shield TBM with a diameter of 3.76m. Responsibilities- Analyzed geological data, borehole logs, other test results, maps, and cross-sections.- Maintained a detailed record of the properties of the soil and rock samples obtained from the tunnel and used these records to compile the geological profile along the tunnel. - Reviewed the geological profile of the tunnel prepared by the contractor.- Supervised and maintained records of tunnel boring and tunnel lining. - Supervised and reported tunnel backfill grouting and tunnel secondary grouting.- Reviewed method statements, Construction drawings, and as-built drawings according to the technical specifications.- Inspected tunnel lining segments for quality issues according to the method statement and approved drawings.- Inspected the reported proper installation of rubber gaskets, sealing strips, and force transfer pads on concrete lining segments. -Participated in the joint inspection of damaged segments in the tunnel and supervised repair works on these damages.- Supervised ground improvement methods such as grouting in areas with shallow overburden and provided recommendations to mitigate the situation. - Participated in ground vibration monitoring along the tunnel trace and mitigating social and environmental impacts during tunnel excavation. Show less

Kalu Ganga Headworks Development Project, Laggala, Pallegama, Matale

Project Details: The Kaluganga Reservoir Headworks Project consists of a Rockfill Main Dam with a central clay core (68m high and 575m crest length), a Rockfill Saddle dam with a central clay core (28m tall and 720m long), a network of Tunnels (Diversion Tunnel, Transfer Canal Outlet Tunnel, Left Bank Outlet Tunnel, and Bottom Outlet Tunnel), a Bottom Outlet Gate Shaft and other appurtenant structuresResponsibilities:-Planned and coordinated geotechnical/geological… Show more Project Details: The Kaluganga Reservoir Headworks Project consists of a Rockfill Main Dam with a central clay core (68m high and 575m crest length), a Rockfill Saddle dam with a central clay core (28m tall and 720m long), a network of Tunnels (Diversion Tunnel, Transfer Canal Outlet Tunnel, Left Bank Outlet Tunnel, and Bottom Outlet Tunnel), a Bottom Outlet Gate Shaft and other appurtenant structuresResponsibilities:-Planned and coordinated geotechnical/geological investigations programs, which included exploratory borehole drilling, mapping, probe hole drilling, trial pits, and geological testing for soils and rocks.-Participated in analyses of geological data, borehole logs, other test results, maps, and cross-sections.-Recognized and advised on foundation geological/ geotechnical issues of dams and appurtenant structures.-Participated in preparing thematic maps and profiles on the geological, engineering geological, and hydrogeological aspects of the dam site.-Planned and coordinated curtain and consolidation grouting programs to improve foundation conditions in dams, tunnels and other structures.-Compiled and evaluated curtain and consolidation grouting data to determine the effectiveness of grouting according to the technical specifications. -Participated in preparing geological and rock support maps for all the tunnels and shafts.-Recognized and determined the required rock supports in tunnels and shafts according to the rock mass classification system. -Modified rock supports according to the actual geological conditions. -Developed geological models for the analysis and interpretation of subsurface data-Reviewed method statements, Construction drawings and as-built drawings according to the technical specification Show less

Uma Oya Multipurpose Development Project

Project Details: The Uma Oya Multipurpose Development Project (MPDP) is a water transfer, hydropower, and irrigation project in the south-eastern part of the central highland region of Sri Lanka. It will transfer 145MCM per year. This head difference produces 120MW of hydroelectric power. Part of the waterway is a 15km long headrace tunnel (HRT), through which water from Diyrabba reservoir transfers to the pressure shaft, followed by a powerhouse cavern. Two Double Shield TBMs excavated the… Show more Project Details: The Uma Oya Multipurpose Development Project (MPDP) is a water transfer, hydropower, and irrigation project in the south-eastern part of the central highland region of Sri Lanka. It will transfer 145MCM per year. This head difference produces 120MW of hydroelectric power. Part of the waterway is a 15km long headrace tunnel (HRT), through which water from Diyrabba reservoir transfers to the pressure shaft, followed by a powerhouse cavern. Two Double Shield TBMs excavated the headrace tunnel with a diameter of 4.30m from both inlet and outlet sides.Responsibilities: -Analysed downhole data, borehole logs, other test results, maps, and cross-sections.-Prepared geological maps and sections for the Head Race Tunnel (HRT).- Supervised and reported rock mass drilling and grouting programs to mitigate water ingress problems in the 15km Head Race Tunnel.- Supervised probe hole drilling to predict adverse geological conditions such as deep-seated shear zones, karstic zones, weathered zones, mixed-face conditions, and water-bearing zones ahead of the tunnel face.-Recognised natural hazards such as slope erosion, landslides, and subsidence.-Analysed recommendations on building settlement, slope and fill stability, and the possible effects of landslides and subsidence. Show less

Bluebay Mineral International is a powder quartz exporting company. Responsibilities included:- Coordinated geotechnical/geological investigations programs - Exploratory borehole drilling- Geological mapping and geological sections- Evaluate the size, orientation and composition of quartz veins.

Department Of Geology

Responsibilities included: -Participated in the Environmental Impact Assessment of the Uma Oya Multipurpose Development project as a volunteer geologist-Compiled and interpreted geological data using satellite images, geological maps and profiles-Prepared maps and Digital Terrain Models to easily visualize field data. -Involved in undergraduate research work.-Conducted undergraduate courses in laboratory and field testing.

Master Of Professional Engineering, Mining Engineering

Activities and Societies: WASM society

Master’S Degree, Engineering Geology And Hydrogeology

Bachelor Of Science (B.Sc.) (Hons) Geology, Geology / Earth Science, Second Class Upper Division

Activities and Societies: University Geological Society

G.C.E. Advanced Level, Physical Sciences

G.C.E. Ordinary Level